Then he starts teaching, using examples out of the everyday lives of his students, making them think things out for themselves, announcing that the “punishment” for not working hard in class is to be banished from the class - a class most of the kids would rather be out of, anyway. The kids themselves are amazed that this strategy works and more amazed still to find that they're expected to do 30 hours of homework a week and come in on Saturday mornings for extra classes.